diff --git a/app/views/submissions_preview/completed.html.erb b/app/views/submissions_preview/completed.html.erb
index 1ab1c268..997356a5 100644
--- a/app/views/submissions_preview/completed.html.erb
+++ b/app/views/submissions_preview/completed.html.erb
@@ -13,8 +13,8 @@
           </div>
           <div>
             <p dir="auto" class="text-lg font-bold mb-1"><%= @submission.template.name %></p>
-            <% if submitter = @submission.submitters.map(&:completed_at).max %>
-              <p dir="auto" class="text-sm"><%= t('signed_on_time', time: l(submitter.to_date, format: :long)) %></p>
+            <% if completed_at = @submission.submitters.map(&:completed_at).compact.max %>
+              <p dir="auto" class="text-sm"><%= t('signed_on_time', time: l(completed_at.to_date, format: :long)) %></p>
             <% end %>
           </div>
         </div>